.popup__input {
    display: block;
    min-width: 100%;
    outline: none;
    border: 0;
    border-bottom: 1px solid rgba(0, 0, 0, 0.2);
    padding: 0;
    padding-bottom: 13px;
    font-size: 14px;
    font-weight: 400;
    line-height: 17px;
    margin: 0 0 5px 0;
}

.popup__input:last-child {
    margin: 0 0 48px 0;
}